The value of Kc for the reaction 2HI (g) H2 (g) + I2 (g) is 1 × 10-4

At a given time, the composition of the reaction mixture is


[HI] =2 × 10-5 mol, [H2] =1 × 10-5 mol and [I2] =1 × 10-5 mol. In which direction will the reaction proceed?


Given equation:

Given, KC =1 × 10-4


By law of mass action the Equilibrium constant for the equation will be;



We know that the reaction quotient, Qc, expresses the relative ratio of products to reactants at a given instant.




[Qc = Reaction quotient]




Here; QC >KC Reaction will proceed in reverse direction.


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